全球水泥在生產過程中，每年會有1.4 Gt二氧化碳排放量，約佔全球人為排放量的5.8%，二氧化碳對於全球暖化的影響極高，因此如何處理二氧化碳排放則成為水泥廠重要的課題。因此本研究之目的是將水泥廠結合鈣迴路與二氧化碳再利用系統，在減低二氧化碳排放的同時經濟效益也能有所提升。
　　本研究透過Aspen Plus的流程模擬水泥廠、鈣迴路與二氧化碳再利用系統之製程，以文獻與台灣水泥公司的實際數據加以驗證，並透過靈敏度分析取得最適化的模擬結果。由於多聯產程序能夠透過分流器靈活調整其操作模式，取得最適合當下情境的架構，因此本研究也根據在台泥和平水泥廠的位置與台灣對於二氧化碳再利用之化學品的需求進行多聯產架構的設計。
　　本研究以產出相同氫氣的情境下，提出三種不同的多聯產設計，並透過經濟分析比較出最佳的多聯產架構，最終得出架構三具有最佳的經濟效益，能夠有效減少1,824.8噸/月的二氧化碳排放並且產出1,790噸/月的尿素與354.1噸/月的甲醇，經過經濟分析後，在二十年的計畫年限，其淨現值為4,394.3M$，且預計6.1年可以回本，並有23%的內部報酬率，說明水泥廠的多聯產設計具有優異的經濟效益並且能減少大量的碳排放。

The world’s cement plants generate 1.4Gt of CO2 emissions each year, accounting for about 5.8% of global anthropogenic emissions.CO2 has a very serious impact on global warming. Therefore, how to deal with CO2 emissions has become an important issue for cement plants.

Therefore, the purpose of this research is to combine the cement plants, calcium looping and the carbon capture and utilization system(CCU), which can reduce CO2 emissions while improving economic benefits.In this study, we simulate the process of cement plant, calcium looping and CCU system by Aspen Plus, validating the simulation result by literature and actual data from Taiwan Cement Corporation (TCC)

Three different polygeneration scenarios under the same H2 production in this research, and compare the best one through economic analysis. Finally, it is concluded that the scenario 1 has the best economic benefits and can effectively reduce 1,824.8 t/month CO2 emissions and production of 1,790 t/month of urea and 354.1 t/month of methanol. After economic analysis, scenario 1 has 23% IRR and the NPV is 4,394.3.5 M$, expected to pay back in 6.1 years.The polygeneration design of the cement plant has excellent economic benefits and can reduce a large amount of CO2 emissions.

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